Question

1. If goods be purchased for Rs. 450 and one-third be sold at a loss of 10% , at what gain per cent should the remainder be sold as to gain 20% on the whole transactions?

Answer 1

1/3 of 450 = 1/3 * 450 = 150
let cp be 100 of each so total cp 45000
cp of 150 is 15000
at loss of 10 % each is sold at 15000-1500 = 13500
left are 30000 should be sold at x
ATQ
What is 20% profit of 45000 is 45000+ 9000= 54000 - 13500 = 40500
40500/45000*100= 90 %